Schlagwort: ‘RobWeld’
First movement of PARAGRIP with new control unit
PARAGRIP’s control architecture has been completely redesigned in order to be fully equipped for its future tasks in multidirectional additive manufacturing (MDAM) with arc welding (WAAM). The movements of all four arms can now be planned, simulated and executed on the real robot using MoveIt in ROS2. The joint positions of the physical robot are always fed back to ROS2, allowing the integration of online planning algorithms in the future. The video shows the planning and execution of a simple test motion of the PARAGRIP.
More information about the project can be found here.
Contact: Jan Wiartalla
Development of new wrists for the Paragrip
In a joint research project of the IGMR together with the ISF of the RWTH Aachen University, the Multidirectional Additive Manufacturing (MDAM) of metallic components is being researched. In order to optimize the multi-armed. Paragrip robot for this application, student Raphael Hoffmann has developed an innovative concept of a new robotic wrist in his bachelor thesis. The concept enables the welding current to be conducted directly through the wristsm without the need for an additional ground cable attached to the print bed. Moreover, the wrists enable form fitting gripping of the print bed with self-centering to minimize positioning inaccuracies.
You can find the video on our YouTube channel: https://youtu.be/VdT1rjYG4D0
Contact:
Jan Wiartalla
Erste FDM Druckversuche im Rahmen der Multidirektionalen Additiven Fertigung
Die ersten Hürden des prototypischen Aufbaus sind geschafft. Nun kann die entwickelte Prozessvorbereitung getestet werden.
https://youtu.be/WlblPv46NG4
Im Rahmen des DFG geförderten Projekts soll die Multidirektionale Additive Fertigung für das Lichtbogenschweißen erforscht werden. Die Prozessvorbereitung soll nun zunächst im FDM Verfahren validiert werden.
Ansprechpartner:
Geplanter Umbau des Paragrip
Um für seine neue Aufgabe in der Additiven Fertigung mittels Lichtbogenschweißen (WAAM) optimal gewappnet zu sein, muss der Paragrip einigen konstruktiven Änderungen unterworfen werden.
In einem gemeinsamen Forschungsprojekt des IGMR mit dem ISF der RWTH Aachen wird an der Multidirektionalen Additiven Fertigung (MDAM) metallischer Bauteile geforscht. Durch das Bewegen des Druckbettes mittels eines Manipulators bei gleichzeitig feststehender Schweißpistole kann das zu druckende Bauteil stets so ausgerichtet werden, dass Stützstrukturen vermieden werden können. Um die Bewegung der Druckplatte dabei nicht durch die Kinematik eines seriellen Industrieroboters zu limitieren, soll der am IGMR entwickelte und gebaute Paragrip mit seinem modularen objektintegrativen Handhabungsdesign zum Einsatz kommen. Die Abbildung zeigt ein Rendering des geplanten Umbaus des Paragrips für den Einsatz in der Multidirektionalen Additiven Fertigung mittels Lichtbogenschweißen.
Ansprechpartner:
Manipulator-specific path planning for multidirectional additive manufacturing
In a joint research project between the IGMR and the ISF of RWTH Aachen University, research is being conducted on the Multidirectional Additive Manufacturing of metallic components.
With the aid of Multidirectional Additive Manufacturing (MDAM), it is possible to build complex components layer by layer and without the need for support structures. By moving the base plate by means of an industrial robot while the welding gun remains fixed, the component to be printed can always be oriented in such a way that support structures can be avoided. The major challenge lies in the consideration of specialized welding processes with external wire feeding and the use of sensors for process monitoring. This results in a dependency of the orientation of the welding gun compared to the currently printed path.
As part of his master’s thesis, Jan Wiartalla developed a path planning algorithm that calculates an executable and, if possible, continuous path within specified, flat part slices that completely fills the cross-sectional area. This is done robot-specific, so that the algorithm always takes the robot currently in use as well as its limitations into account. A standardized interface allows for the robot model to be easily exchanged and the algorithm can thus quickly be adapted to different test environments. The video illustrates the algorithm’s procedure in a simplified way.
https://youtu.be/chuD57ja9JE
Contacts:
Multidirectional additive manufacturing in arc welding process
In collaboration with the ISF, RWTH Aachen, we at IGMR are researching Multidirectional Additive Manufacturing. In this application for the production of metal components.
Multidirectional Additive Manufacturing enables the production of complex components without support structures, both in the classic FDM process with plastic and with layer-by-layer buildup in the arc welding process. At IGMR, the entire process chain of additive manufacturing is being extended to meet the special challenges of this process from a robotic perspective. This includes the slicing of a virtual component into layers, the subsequent planning of a collision-free structure, the generation of executable robot paths for filling the layers as well as the necessary trajectory planning.
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Contact person:
Markus Schmitz
Carlo Weidemann
https://youtu.be/vYejNjBSUp8
WAAM simulation with ROS in Gazebo
Vincent Brünjes designed a Gazebo plug-in in his master‘s thesis to simulate multidirectional wire+arc additive manufacturing processes.
Contacts:
